9.0 Ensure that document-node is redirected to the nearest parent on workspace change

[mhsdesign]

The pr https://github.com/neos/neos-ui/pull/3734 fixed the behaviour in Neos 8.3 but the code was not upmergeable.

The current 9.0 implementation throws many phpstan errors and is probably doomed in some way and must be refactored. https://github.com/neos/neos-ui/blob/716966726afc1d131890a2c52055ee46d0847848/Classes/Controller/BackendServiceController.php#L476-L480

Both scenariao should pass at the end.

Scenario 1:

create workspace create new subpage in workspace and publish and highlight it change workspace to live again

Scenario 2:

create workspace create new subpage in workspace create new subsubpage in workspace publish and highlight the new subsubpage change workspace to live again